add justfile #3

	# This GitHub Workflow performs continuous integration on my Advent of Code project,
	# where each job handles a separate language sub-project.
	#
	# Haskell sub-project is currently WIP.
	#

	name: "Continuous Integration"
	on:
	push:
	branches:
	- main
	tags:
	- "v*"
	pull_request:

	jobs:
	scala-build-and-test:
	name: "Scala - Build and Test"
	strategy:
	matrix:
	os:
	- ubuntu-latest
	jvm:
	- "temurin:21"
	runs-on: ${{ matrix.os }}
	steps:
	- name: "Checkout repository"
	uses: actions/checkout@v4
	with:
	fetch-depth: 1

	- name: "Setup Scala-CLI project using VirtusLab action"
	uses: VirtusLab/[email protected]
	with:
	jvm: ${{ matrix.jvm }}

	- name: "Compile Scala-CLI project"
	run: scala-cli compile advent-of-code-scala

	- name: "Run Tests"
	run: scala-cli test advent-of-code-scala

	- name: "Sanity check by running solution for Day 1 of 2015"
	run: scala-cli run advent-of-code-scala --main-class solutions.y2015.day01.run

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